Panggabean, B. D., and A. Y. U. Putra. “ANALYSIS OF NATURAL UNDERGROUND TUNNEL BASED ON ROCK MASS RATING CLASSIFICATION IN TASANGKA AREA, JAYAPURA CITY”. INTAN Jurnal Penelitian Tambang, vol. 9, no. 2, Nov. 2026, pp. 59-68, doi:10.56139/intan.v9i2.460.